another failing test

packages/svelte/tests/runtime-runes/samples/async-boundary-pending-live/_config.js

@@ -0,0 +1,38 @@
+import { tick } from 'svelte';
+import { test } from '../../test';
+
+export default test({
+	html: `
+		<button>increment</button>
+		<button>shift</button>
+		<p>0</p>
+	`,
+
+	async test({ assert, target }) {
+		const [increment, shift] = target.querySelectorAll('button');
+
+		increment.click();
+		await tick();
+
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>increment</button>
+				<button>shift</button>
+				<p>1</p>
+			`
+		);
+
+		shift.click();
+		await tick();
+
+		assert.htmlEqual(
+			target.innerHTML,
+			`
+				<button>increment</button>
+				<button>shift</button>
+				<p>resolved</p>
+			`
+		);
+	}
+});

packages/svelte/tests/runtime-runes/samples/async-boundary-pending-live/main.svelte

@@ -0,0 +1,31 @@
+<script>
+	let resolvers = [];
+
+	function push(value) {
+		const deferred = Promise.withResolvers();
+		resolvers.push(() => deferred.resolve(value));
+		return deferred.promise;
+	}
+
+	function shift() {
+		resolvers.shift()?.();
+	}
+
+	let count = $state(0);
+</script>
+
+<button onclick={() => count += 1}>
+	increment
+</button>
+
+<button onclick={shift}>
+	shift
+</button>
+
+<svelte:boundary>
+	<p>{await push('resolved')}</p>
+
+	{#snippet pending()}
+		<p>{count}</p>
+	{/snippet}
+</svelte:boundary>